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So just as an introduction:
The consequences of non-immunized diseases epidemics have demonstrated to be devastating to humans in general. It's well known that Amerindians weren't immunized against european diseases in 1492.
For example, the bubonic plague consequences in europe:
"The Plague of Justinian in the 6th and 7th centuries is the first known attack on record, and marks the first firmly recorded pattern of bubonic plague. From historical descriptions, as much as 40% of the population of Constantinople died from the plague. Modern estimates suggest half of Europe's population died as a result of the plague before it disappeared in the 700s."
"In the Late Middle Ages (1340–1400) Europe experienced the most deadly disease outbreak in history when the Black Death, the infamous pandemic of bubonic plague, hit in 1347, killing a third of the human population. Some historians believe that society subsequently became more violent as the mass mortality rate cheapened life and thus increased warfare, crime, popular revolt, waves of flagellants, and persecution. The Black Death originated in Central Asia and spread from Italy and then throughout other European countries. Arab historians Ibn Al-Wardni and Almaqrizi believed the Black Death originated in Mongolia. Chinese records also showed a huge outbreak in Mongolia in the early 1330s. Research published in 2002 suggests that it began in early 1346 in the steppe region, where a plague reservoir stretches from the northwestern shore of the Caspian Sea into southern Russia. The Mongols had cut off the trade route, the Silk Road, between China and Europe which halted the spread of the Black Death from eastern Russia to Western Europe. The epidemic began with an attack that Mongols launched on the Italian merchants' last trading station in the region, Caffa in the Crimea. In late 1346, plague broke out among the besiegers and from them penetrated into the town. When spring arrived, the Italian merchants fled on their ships, unknowingly carrying the Black Death. Carried by the fleas on rats, the plague initially spread to humans near the Black Sea and then outwards to the rest of Europe as a result of people fleeing from one area to another."
It seems that the bubonic plague managed to kill 50% and 40% of the european population respectively.
In 1492, as europeans arrived there was an exchange of diseases when contact between the natives and the explorers happened. Yet the ammount of diseases each side exchanged was completely different.
This image resumes the ammount of diseases brought to America and vice versa:
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"One of the most devastating diseases was smallpox, but other deadly diseases included typhus, measles, influenza, bubonic plague, cholera, malaria, tuberculosis, mumps, yellow fever and pertussis, which were chronic in Eurasia."
There should be mentioned that the ammount of diseases brought until the XXI century are more than 20.
So, the question is, how did Amerindians survived after all those non-immunized diseases reached America?
Were they better prepared than europeans?
Why is there an image of Amerindians being bad at reacting against non-immunized diseases, when they received more than any other ethnic group in fewer years?
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